fix oss sandcastle job

Summary:
My recent stack of diffs introduced a handful of oss bugs :(.

1. VLOG_EVERY_MS is an internal function.
fix: added an oss stub version

2. Forgot to add QsfpCache.cpp to CMakeLists.txt
fix: add it

3. vanilla gcc5.4 has a bug where it can't handle lambdas like:
  [this]() {
    memberFn();
  }
and instead you need to write like:
  [this]() {
    this->memberFn();
  }

fix: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67274 says it should
be fixed in gcc7, but I added 'this->' in the meantime.

4. The base fb303.thrift file we have in open source does not declare
aliveSince, which we now call on qsfp_service.

fix: add it to fb303.thrift

Reviewed By: ninas

Differential Revision: D6627705

fbshipit-source-id: 2100783df1ea0e9af0fed66e4e24ef85b71fc7e9

common/fb303/if/fb303.thrift

@@ -38,7 +38,7 @@ service FacebookService {
   /**
    * Gets the status of this service
    */
-  fb_status getStatus(),
+  fb_status getStatus() (priority='IMPORTANT'),
 
   /**
    * Gets the counters for this service
@@ -50,4 +50,9 @@ service FacebookService {
    */
   oneway void shutdown(),
 
-} (priority = 'IMPORTANT')
+  /**
+   * Returns the unix time that the server has been running since
+   */
+  i64 aliveSince() (priority = 'IMPORTANT'),
+
+}

common/logging/logging.h

@@ -0,0 +1,16 @@
+/*
+ *  Copyright (c) 2004-present, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+#pragma once
+
+// TODO: actually implement this
+#ifndef VLOG_EVERY_MS
+#define VLOG_EVERY_MS(verboselevel, ms)     \
+  VLOG(verboselevel)
+#endif